摘要
为了研究地铁区间隧道半横向排烟方式对排烟效果的影响,利用火灾动力学模拟软件FDS研究在车厢内部着火且火源功率为5 MW的情况下,不同的排烟道高度、排烟风速、排烟口开启个数对隧道内烟气控制的影响,即对不同工况下,隧道内烟气蔓延情况、人眼特征高度处的CO浓度、温度进行研究并作对比分析。结果表明,综合考虑排烟效果与隧道挖掘成本,排烟道设置高度为1.6 m较为合适;排烟风速控制为10 m/s并且开启火源附近2个排烟口能获得较好的排烟效果。
In order to study the effect of smoke exhaust in the subway tunnel under semi- transverse exhausting smoke,by using the fire dynamics simulation software FDS,conducts researches on how the height of flue,the number of opening exhaust outlet and exhaust velocity impact the smoke exhaust effect of semi- transverse ventilation with heat release rate of 5 MW inside the carriage. That is to say,the smoke spread and the temperature,CO concentration are studied and compared in different conditions. The results show that： considering effect of smoke exhaust and the cost of tunneling,it is relatively appropriate that the height of flue is designed to 1. 6 m; the exhaust velocity is controlled to 10 m/s and the opening of two exhaust outlets near the fire can obtain a good effect of exhausting smoke.
出处
《工业安全与环保》
北大核心
2015年第12期38-41,共4页
Industrial Safety and Environmental Protection
基金
陕西省教育厅自然科学基金(12JK0596)
西安建筑科技大学自然科学基金(JC1208)
关键词
地铁区间隧道排烟
半横向式排烟
排烟效果
数值模拟
subway tunnel exhausting smoke
semi-transverse exhausting smoke
exhausting smoke effects
numerical simulation
